chondricthyes, shark, vertebrata.




Chondrichthyes (/kɒnˈdrɪkθᵻ.iːz/; from Greek χονδρ- chondr- 'cartilage', ἰχθύς ichthys 'fish') is a class that contains the cartilaginous fishes: they are jawed vertebrates with paired fins, paired nares, scales, a heart with its chambers in series, and skeletons made of cartilage rather than bone. The class is divided into two subclasses: Elasmobranchii and Holocephali.

Within the infraphylum Gnathostomata, cartilaginous fishes are distinct from all other jawed vertebrates.

Comments

  1. UnknownFebruary 17, 2017 at 8:41 PM

    The shark is very dangerous. They kill man and eat. They get smeal of blood from many far. Wow
    ......how dangerous!

    ReplyDelete

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